Double Knife Edge Door for Government

Double Knife Edge Door for Government

​ETS-Lindgren's Double Knife Edge Door (DKE) is a heavy-duty door, constructed of exceptionally rugged materials with designed-in reinforcements, making this door ideal for high-performance government and frequent use applications.

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Key Product Information

​​Construction

The ETS-Lindgren DKE Door consists of a factory assembled leaf and frame, which maintain electrical contact around the perimeter. The door panel is laminated on both sides with 22 gauge galvanized steel. Heavier gauges are available for improved magnetic field performance. The bronze double knife edge extrusion is mounted on the door leaf and the receiver housing is mounted to the frame. The two knife edges of the leaf mate with four rows of beryllium copper finger-stock mounted in the bronze recessed contact mechanism receiver housing. The beryllium finger-stock is easily maintainable and replaceable with standard tools.Each door leaf is supported by three heavy duty aluminum hinges for sag-free mounting and latched by a three-point roller bearing latch assembly. These features serve to provide a high reliability door which will deliver many years of trouble-free service.The DKE Door is available in the standard size of 0.91 m to 1.22 m (3 ft to 4 ft) width and 2.13 m (7 ft) height, both single and double leaf, and custom fabricated sizes.

Performance

The DKE maintains 120 dB attenuation to 10 GHz, and 100 dB at 26 GHz. When tested in accordance with MIL-STD 285/IEEE-299, the DKE design exceeds the test requirements of NSA 65-6/94-106 and CID/09/12A.

Operation

Latching is accomplished manually by a heavy duty aluminum handle on both interior and exterior sides. The door pivots at a minimum of three hinge points on six thrust bearings. The cam driven, manual three-point latching mechanism consists of a gear driven welded latch bar, which is held in alignment by two latch bar bearing guide blocks. The six precision machined latch bar guides secure the assembly on the door leaf and drive three cam follower bearings into the door strikes mounted on the door frame.

Interface Capabilities

T​he DKE can be integrated with various security systems, fire detection systems and cipher locks. Integration with auto latching, locking hasps and quick release opening mechanisms may also be achieved. The door can be equipped with a ramp for heavy equipment transportation into the shielded area.